<template>
  <div>
    <h1>App</h1>
    <h2>App中的h2</h2>
    <HelloWorld />
  </div>
</template>

<script>
import HelloWorld from './HelloWorld.vue'
export default {
  name: 'App',
  components: {
    HelloWorld,
  },
}
</script>

<style scoped>
h1 {
  height: 100px;
  width: 150px;
}
/* 深度选择器 */
div >>> div h2 {
  color: aqua;
}
</style>
